IASSC Certified Lean Six Sigma Black Belt (ICBB) — Question 29

Bias refers to:

Answer options

• A. The variation in the average when the same product or service is measured by different operators using the same measuring equipment.
• B. The way measurements are clustered around the center.
• C. The variation between the average measurement value and the actual value of the reference standard under analysis.
• D. The variation of a measurement against a standard or a quality tool which is accepted as a point of reference.

Correct answer: A

Explanation

The correct answer, A, describes bias as the variation in averages resulting from different operators using the same equipment, which highlights the inconsistency in measurements. Options B, C, and D refer to concepts related to measurement but do not accurately define bias, focusing instead on clustering, discrepancies from actual values, and variations against standards.